Process of making sheet-glass.



.No. 877,729. PATENTED JAN-'28, 1908.

M. J. OWENS. v

I PROCESS OF MAKING SHEETGLASS.

APPLICATION FILED JAN. 26, 1907.

Z SHEETBSHEET 1.

JUUUUUUUUUE v 77w na 1L m Jwwmrww RIO-877,729. PATENTED JAN. 28, 1908.

M. J. OWENS. PROCESS OF MAKING SHEET GLASS.

'APPLIOATION FILED JAN. 26, 1907.

2 SHEETS-SHEET 2.

II II I! II entra n snares rarnnr orn ten.

MICHAEL J. OWENS, OF TOLEDO, OHIO, ASSIGNOR TO THE TOLEDO GLASS COMPANY; OF

' TOLEDO, OHIO, A CORPORATION OF OHIO.

PROCESS OF MAHNG smn'r-enass. f I

no. swans.

Specification of Letters Patent.

Patented Jan. as, race.

Application filed January 26. 1907. Serial No. 354260.

To all whom it may concern:

Be it known that I, MICHAEL J. OWENs, a citizen of the United States of America, residing at Toledo, in the county ef Lucas and State of Ohio, have invented certain new and useful Improvements in Processes of Making Sheet-Glass, of which the following is a specification, reference being had therein to the through the leer; Fi

flame; and, finally, annealing, as more fully hereinafter described.

In the drawings, Figure 1 is a section through a simple form of press which might be used in pressing the sheet to its sheet form;

.Fig. 2 is a section through the mold, showing the parts in the molding position; Fig. 3. is a section of the sheet, with the bail or handle attached as pressed and in the mold; Fig. 4 isa longitudlnal section on line a:m of Fig. 3; Fig. 5 is a section through the fire-polishin furnace; Fig. 6 is a lan view of the firepo ishing furnaces and t e leer, showing how the same may bearranged in a plant for carrymg out ,my process; Fig. 7 is a section 8 is a longitudinal section of the fire-polis 'n'g furnaces of Fig. 6

and Fig. 9 is 8. Ian view of aslightly modified apparatus or car 'ng out my: process. A represents a mold i h which moltenglass is. put, and B the plunger .or'press forressing the mold into-sheet shape in the mold A. At

" one or more points in the side ofthe mold B,

I provide a groove or recess 0, enlargin at its end, and with an aperture at the en so that a bail or handle D may be inserted therein. The handle may be roughened, or provided with a head, or with a screw, or any othermeans, so as to firmly attach the glass to the handle.

The molten glass having been put into the mold A, the press B being of complementary shape and being lowered therein will'form a plate E of a desired form, with an extension F, the outer an or which extension will inclose and be firmly secured thereto, as plainly shown in Fig. 4. After being ;molded, the

glass is allowed to remain in the mold until I it is sufficiently chilled, so that it may be handled by grasping the handle or'bail D.-

It may be desirable to have the sides of the mold A movable to more readily lift out the I formed sheet, but as this is an obvious expedient and is wellknown in mold making of all kinds I do not deem it necessary to illustrate it. .The sheet thus for-med, with its at? tached handle or bail, is then placed upon a carrier G running in a track H, and is fed by any suitable means into the fire-polishing furnace I. I preferably first fireolish the surface of the'glass with a smoky ame, such smoky flame being well known to glass Workers, and this I accomplish in the furnace I. I may, if desired, however, immediately fireolish it with a clear or non-smoky flame, hutI think better results are, and a better surface is, obtained by fire-polishing first with a smoky flame. In caseemploy both the smoky flame and the non-smoky flame, the furnace I is the non-smoky flame furnace,'-I next pass the sheet through a furnaceJ having a clear or non-smoky flame, and finish the fire-polishin Both of these furnaces have burners K entering from op osite sides, so that both sides of the glass will be simultaneously fire-polished. The carrier which supports and carries the glass during this fire-polishing o eration maycontinue beyond the fire-polis 'ng furnace, and

vso

through the leer,which I have shown in I diagram at K,- s0 that after leaving the firepoli'shin'g furnace it will' enter the leer, and. travel therethrough in the well knownmam l ner of operating leers in glass establishments.

- In handling large sheets,and possibly even in ha'ndlmg 'small sheets,I may provide two, or even more, of the extensions F and handles D to a single sheet, so that there glass during the fire-polishing operation.

By maintaining the glass in a vertical p 0- sition throughout the fire-polishing and annealing process, all tendency to warp or bend is revented.-

y this process the glass may be 'ven a plate-glasssurface, notwithstanding t e factthat it starts out with a pressed surface hair a ing the mold marks thereon. In addition tov willbe no tendency to sag in portions of 'the' plant rec this, the process is extremely simple, andthe 7 uired is equally simple andoquite' economical of space.

Instead of. applyin the heat to both sides of the glass during the" fire-polishing operation, wvhich may possibly tend to cause-it .to sag at certain points that may be overheated ,I may, as shown in the diagram in Fig. 9, apply the heat through the burners K upon one side, andnpon the opposite side,

through nozzles L, I may direct-jets of air. This will insure only the melting of the surface and prevent any possibility of overheating the plate so thatjit will sag. '15

In this process, of course, .1 only fire-finish but one side, and apply the air jets to'the other, and then have another furnace, indicated at M,

\ attached carr'ylng means at the edge thereof,

and then in fire-polishing the surface of said means in a vertical position.

v 2'. The process of making glass sheets, 5011-" l sisting in -pressing the molten glass into sheet form, and then in fire-polishing one side 3 thereof while cooling.the opposite'side by air,

a V next in fire'polishin'g the opposite side and pp y 3 The process of making glass sheets, eong the cooling means tojthe. side al-' I ready fire-polished.

-sisting in first pressing the molten glass into sheet form, with an attached. supporting means, next firepolishing one side and'a plyin cooling air jets to the opposite si e, 1 and and applying cooling air jets to t e fire-p01 ally fire-polishing the op osite side is'hed side, the fire-polishing operations being 4. The processof making glass sheets, consisting first in pressing the molten glass into carried on while the glass'is suspended in a vertical position by said supporting means.

sheet form, next in fire-polishing the surface 7 thereof with the smoky'flame, and next in fire-p6lishing the surface thereof with a clear or non-smoky flame.

tical position, next in fire-polishing the lass with a smeky flame, and then'firespolis 'ng the said shee'tfwith a clear "or non-s1noky flame while thus suspended; 1 sheet while suspended by said supporting i resence-oftwo witnesses.

' 'M1cnAEL a: OWENS. p Witnesses:

ln testimony whereof I' IaHiX my signature WILLIAM EMIL fBooK, HUGH 0; Ross."

l The process'of making glass sheets, con 

